What is the main factor that determines what will happen to a star after it consumes all of its nuclear fuel?
A) temperature B) velocity C) mass D) size E) composition
C
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In a battery, the following two oxidation-reduction reactions are taking place: rxn A: Zn + 2 OH- ? ZnO + H2O + 2e- rxn B: 2 MnO2 + H2O + 2e- ? Mn2O3 + 2 OH-What is undergoing oxidation?
A. Zn B. MnO2 C. ZnO D. H2O E. OH-
The water table is the
A. bottom of the zone of saturation. B. top of the zone of aeration. C. zone of infiltration. D. top of the zone of saturation.
The greater the difference in air pressure, the ________
A) more horizontal the wind direction B) more vertical the wind direction C) faster the wind speed D) slower the wind speed
The volcanic activity in Yellowstone National Park is caused by ________
A) subduction B) a divergent plate boundary C) intraplate volcanism D) a transform plate boundary